Energy transfer-based spectral properties of Tb-, Pr-, or Sm-codoped YAG:Ce nanocrystalline phosphors

Abstract Tb3+-, Pr3+-, or Sm3+-codoped YAG:Ce nanocrystalline phosphors were prepared using a modified polyol process. Possible tunability of Ce3+-related yellow emission in codoped YAG:Ce nanocrystalline systems was investigated. Dual emission of yellow and red spectral component with a single excitation wavelength was observed from YAG:Ce, Pr or YAG:Ce,Sm codoped systems via an energy transfer from Ce3+ and Pr3+ or Sm3+ ion. It was also observed that the energy transfer event in YAG:Ce, Pr nanocrystalline phosphor occurs mutually between Ce3+↔Pr3+, while in YAG:Ce, Sm and YAG:Ce, Tb the energy transfer progresses one way. The detailed pathways for transferring an excitation energy are explained based on the energy level diagrams of respective Ce3+, Pr3+, Sm3+, Tb3+ ion.

[1]  Abanti Nag,et al.  Photoluminescence of Sr2 − xLnxCeO4 + x/2(Ln = Eu, Sm or Yb) prepared by a wet chemical method , 2003 .

[2]  Z. Frukacz,et al.  Luminescence and scintillation properties of YAG:Pr , 2001 .

[3]  Z. Fu,et al.  Spectral properties of rare-earth ions in nanocrystalline YAG:Re (Re = Ce3+, Pr3+, Tb3+) , 2006 .

[4]  Hong Liu,et al.  Preparation of YAG:Nd nano-sized powder by co-precipitation method , 2004 .

[5]  Hong Liu,et al.  Rapid synthesis of YAG nano-sized powders by a novel method , 2004 .

[6]  Hyun Woo Lee,et al.  Enhanced luminescent properties of Y3Al5O12:Tb3+,Ce3+ phosphor prepared by spray pyrolysis , 2007 .

[7]  Hong Liu,et al.  Preparation of highly dispersed YAG nano-sized powder by co-precipitation method , 2006 .

[8]  Jun Lin,et al.  Synthesis-dependent luminescence properties of Y3Al5O12:Re3+ (Re=Ce, Sm, Tb) phosphors , 2002 .

[9]  G. Blasse,et al.  A NEW PHOSPHOR FOR FLYING‐SPOT CATHODE‐RAY TUBES FOR COLOR TELEVISION: YELLOW‐EMITTING Y3Al5O12–Ce3+ , 1967 .

[10]  M. Haase,et al.  Synthesis, Growth, and Er3+ Luminescence of Lanthanide Phosphate Nanoparticles† , 2003 .

[11]  S. Yin,et al.  Preparation and characterization of Y3Al5O12 (YAG) nano-powder by co-precipitation method , 2005 .

[12]  Qiang-Bing Li,et al.  The crystal structure and spectra of nano-scale YAG:Ce3+ , 2000 .

[13]  W. Sigmund,et al.  Synthesis of YAG phase by a citrate-nitrate combustion technique , 1999 .

[14]  Min Yin,et al.  Visible Upconversion in Rare Earth Ion-Doped Gd2O3 Nanocrystals , 2004 .

[15]  Hong Liu,et al.  YAG:Ce nano-sized phosphor particles prepared by a solvothermal method , 2004 .

[16]  Hong Liu,et al.  Solvothermal synthesis and luminescent properties of YAG:Tb nano-sized phosphors , 2005 .

[17]  Won Bin Im,et al.  Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs , 2007 .